#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 23.67361799 56.86820092 -gcp 21600.0 0.0 23.67777886 56.95447863 -gcp 21600.0 22038.0 23.85315485 56.96191632 -gcp 0.0 22038.0 23.8569322 56.8563991 GX2261/GX_2261_SK_frame_2.jpg GX_2261_SK_frame_2.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1176.0 2712.0\n1224.0 18936.0\n17040.0 19032.0\n16872.0 4104.0\n15360.0 2352.0" | \
  gdaltransform -tps -output_xy GX_2261_SK_frame_2.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  GX_2261_SK_frame_2.vrt GX_2261_SK_frame_2.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES GX_2261_SK_frame_2.cut.vrt GX_2261_SK_frame_2.xyz